And then these slides show up a year later. It all fits. What is available now is Source 1.0 build 5506. Naturally, Source 2.0 would supersede it. Additionally, PC Games N wasn't the only one to say "Source 2." Pictures were leaked previously and published on Game Trailers; moreover, they have a photo there of a Valve computer with a bug list and "Source2" is directly referenced in it. Great graphics cost performance. I played it on an 9800 Pro and X800 XL. Neither had any problems running it.